Organic coatings lacquers

Organic Coatings. Organic coatings or lacquers protect the steel or tin from external or internal corrosion. The can interiors are coated to prevent undesirable reactions between the interior metal surface and the product. These reactions involve (1) corrosion of the tin coating caused by oxidants in the product, (2) color or flavor loss by the product because of metal ion pickup, or (3) staining of the metal by sulfur-con-... 

Note 1 This term was used originally because of its analogy with a natural resin (rosin) and designated, in a broad sense, any polymer that is a basic material for plastics, organic coatings, or lacquers. However, the term is now used in a more narrow sense to refer to prepolymers of thermosets (thermosetting polymers). 

Coating operations organic solvents lacquered ware... 

Uses Photoinitiator for radiation-cured inks, coatings, lacquers in organic synthesis Manuf./Distrib. ABCR http //www.abcr.de] Aceto http //www.aceto.com] Acros Org. http //www.acros.be, Aldrich http //www.sigma-aldrich.com] Alfa Aesar http //www.alfa.com Alfa Chem... 

Uses Solvent for syn. resins (nitrocellulose, ethylcellulose, CAB, some vinyl copolymers, PS, methacrylate resins), gums, plastics, oils and fats, cosmetics, pharmaceuticals solvent, flow aid, coalescent in paints/coatings, lacquers, printing inks organic synthesis odorant in perfumes recovery of acetic acid from dil. aq. sol ns. synthetic flavoring agent in foods and pharmaceuticals recovery and crystallization of drugs in food-pkg. adhesives in cellophane for food pkg. 

Lacquer—A type of organic coating in which rapid drying is effected by evaporation of solvents. Laser—A term for light amplification by stimulated emission of radiation laser is a cavity with mirrors at the ends, filled with material such as crystal, glass, liquid, gas, or dye. It produces an intense beam of light with the unique properties of coherency, coUimation, and monochromaticity. 

Clear organic coatings have been developed to preserve the attractive, bright, as-polished, zinc, zinc alloy, or zinc-coated surfaces. The coatings may be either acrylic or polyurethane lacquers or polyester powders and may be colorless or tinted, usually to simulate brass. They usually incorporate ultraviolet absorbers and a complexing agent for zinc (dithiooxamide). They have only a limited life and, in the atmosphere, usually must be renewed after 3-10 years (depending on the environment) to retain appearance. 

D 2077 ASH IN FATTY QUAT AMMONIUM CHLORIDES D 2074 INDICATOR METHOD, FATTY AMINES D 2075 IODINE VALUE OF FATTY AMINES D 2076 ACID/AMINE FATTY QUAT AMMONIUM CHLORIDE D 2078 IODINE OF FATTY QUAT AMMONIUM D 2079 NONVOLATILES/FATTY AMMONIUM CHLORIDES D 2081 PH OF FATTY QUATERNARY AMMONIUM CHLORIDES D 2086 ACIDITY IN VINYL ACETATE AND ACETALDEHYDE D 2090 CLARITY/CLEANNESS OF PAINT AND INK LIQUIDS D 2091 PRINT RESISTANCE OF LACQUERS D 2197 SCRAPE ADHESION OF ORGANIC COATINGS... 

Filiform Corrosion. Filiform corrosion is a special form of crevice or oxygen cell corrosion occurring beneath organic or metallic coatings on steel, zinc, aluminum, or magnesium. Filiform corrosion normally starts at small, sometimes microscopic, defects in the coating. Lacquers and "quick-dry" paints are most susceptible to the problem. 

Today most lacquers are made with cellulosic, alkyd, acrylic, and vinyl resins. (2) Finish on Chinese and Japanese lacquer ware. (Wicks ZN, Jones FN, Pappas SP (1999) Organic coatings science and technology, 2nd edn. Wiley-Interscience, New York) See Spirit Varnish. 

Lacquer a type of organic coating in which rapid drying is effected by evaporation of solvents... 

Uses. Cellulose nitrates with differing nitrogen contents have various appHcations (Table 3). The largest iadustrial use of CN is protective and decorative lacquer coatings. CN is soluble ia a variety of organic solvents and yields clear, tough films. CN is also compatible with many plasticizers and resias. 

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